Locking device for carriage doors



May 18 1926.

C. W. A. HANNEBOHN LOCKING DEVICE FOR CARRIAGE DOORS Filed Jan. 10, 1925 Patented ll 'lay l 1926.

CURT WILLIBALID ALEXIS HADTNEBOHN, OF BERLIN-CHARLOTTENBURG, ASSIGNOR 'lO ALEXIS KELLNEE, 0F BERLIN-CHAELOTTENBURG, GERMANY.

LOCKENG DEVICE FOR CARRIAGE 1300353.

Application filed January The doors of carriage-bodies, especially those of motor-carriages, are mounted generally with a certain free play in order to prevent clamping of the doors in their i'raines by reason of their unavoidable warping as taking place in service in the course of time. On the other hand, mounting the doors with a free play entails the disadvantage that they commence to rattle already after a comparatively short time. of use of the carriage which is felt an annoy- 111;; drawback.

The object of my invention is to obviate that drawback and I attain this object by doing away with the free play existing be tween the door and its frame when the door is closed by means of a locking; device consisting essentially of a pin connected firmly either with the door or with the frame thereof, and of a gripper-hook encompassing said pin and being so arranged that a pull can be exerted on it, this pull being effected preterably by an eccentric which may be combined with the usual ring by which the door is to be closed. In order to prevent the grip or handle which is easily accessible when the door is opened. from being disadjusted by an unauthorized person in such a manner that the gripper hook can get out of the door or the lining; of the same which would cause damage to the carriage-body when the door is being: closed, as well as bendingof said hook, the locking device is provided with an automatically acting; checking device which does not impede the free movability of the gripper device when the door is closed, but which retains the rearwardly turned gripper hook within the door or the door lining when the door is open.

My invention is illustrated diagrammatically and by way oi example in the accompanying drawing); in which Figure 1 is a side-view of the combined locking and checking device, the lock-plate being partly broken away and the ;;ripper hook being withdrawn; Figure 2 is a similar view showing the parts in the locking position of the gripper hook; Figure 3 is a section in line A l of Fig. 2 it being supposed that the door is open; Figure 4; is another such section, it beingsupposed that the door is closed and the gripper is in its operative position; and Figures 5 and 6 are plans of a earriagabody door provided with the 1c, 1925. Serial No. 1,ee1.

ent invention, Fig. 5 showing this door in closed state, Fig. 6 showing it in open state.

On the drawing; a denotes the carriage- "body door which is furnished with the usual outer grip Z). Pretty much free play is left between the door a and the frame 9, but this play is done away with by the locking device constitutinp; the present invention. This device consists of: a draw-bar 0, to. the front end of which is hinged a gripper hook (Z by means of a bolt or pivot e. The hook (Z can pass outwards through an aperture provided in the bolt-nab and can then engage a pin is located in the door-frame g.

licloving the draw-bar to and fro and actuating thereby the gripper hook (Z is effected by a disk Z embraced by a ring m made integral with the bar a; the disk Z can turn in the ring on, but it is an eccentric motion in that the bolt or pivot a which serves as fulcrum for the disk is arranged eccentrically with respect thereto. The pivot 41 is connected firmly with a grip or handle 0 which may be annular, if desired. he ring m is flattened at its lower side, and this flattened portion can contact with an. abutment p provided on the lock-plate The disk Z is supported in this plate g and in the opposite plate 7.

The configuration of the operative end of the hook, especially on the face located opposite the pivot e is such that door a is drawn towards and against the frame 9 when the operative end of the hook has arrived at the pin has come in contact therewith, and has then been moved further down until having; arrived in the end-position indicated in Fig. 2 in which the door and the front-part concerned he firmly against one another.

The eccentric Z can now be turned only' counter-clockwise whereby the members m, 0, e, d, will be moved reversely to their former movement, that is to say, the hook 0? will be disconnected from the pin 7:, or this will be released from said hook respectively.

lVhen the gripper hook (Z is in its position shown in Fig. 2, the flat part of the ring 'm, does not contact with the abutment 19, the said abutment serves only for the purpose to hold the draw bar 0 and the gripper hook d for the event that the pivot or handle 0 should be turned while the door is open. The abutment prevents in such a case the gripper hook swinging so far, that, after the door has been closed the hook (Z lies beneath the pin 70. The abutment y? further prevents the gripper hook (Z from being swung too far rearwardly.

The gripper (Z, the tree end of which is curved, as shown in Fig. 1, is provided in the outer face of its head with a curved recess 1 which can be engaged by a tongue 2 that is connected firmly with a squarehcad bolt 3 guided in a hood 4; and pr rided with a disk 5. Between this dish and the cover of the hood 4: a strong COMPTQSSlOH-SPTiElQ G is provided, a pin 8 projects from the sheetinetal member 7 which closes the hood on its inner side, that pin contactii when the door is closed with the deor-abutinent 9 whereby the pin 8 is pressed back and the spring; is put under tension. By this movement the tongue 2 which is secured to the bolt 3 is pressed so much outwards that the gripper (Z can be moved to and fro at will. 1.1, however, the door is opened. the spring; 6 presses the pin 8 out of the locloplate, the tone 9, then engaging; the recess 1 ot the gripper whereby this latter is checked in its withdrawn position. The door a must he rovided with recess 10 into which the head of the bolt 3 can enter when the checking device has been pressed back.

The manner of operation of the device is as follows:

If the grip 0 is in the position shown in Fig. 1, the rod 0 is withdrawn so that the hook cZ lies behind. the lock-plate f. It then the grip 0 is turned in the direction indicated by the arrow (Fig. 1), the rod 0 will he shoved forward by reason of the eccen tric motion of the disk Z within the m the hook (Z which turns on the station '37 pivot 0 being; then caused to project "forth from the plate f and to engage the pin 70, shown in Fig. 1 in dotted lines. By exertili S ing an eccentric draught on the membe s and (Z the door is drawn grrailually a the door frame whereby the door vented completely ii'roin ratt r. fi hm the hook (Z is in vertical position, as shown in full lines in Fig. 1, it can he 8953i: against spontaneous or other turning l checking device shown and described.

I claim:

1. A locking); device for use in comm-lion with doors and door-frames, especially 1;! the bodies of motor carriages, con'iprisii in combination, a gripper pivotally inou ed on the door, a pin located in the doorframe in such a position relativel to said gripper that the gripper can enga c said p u when said gripper is in its operative position; a liar hinged to the "ripper and an eccentric ii a connected r1 idly with said. bar and hat periphery;

pre-

no a [lat face on its an eccentric disk within said ring; and abutment nieinber adapted to co-ope" with the fiat face mentioned, suhstantiallgq as set forth.

2. A loclrinp; device for use in connection with doors and door-frames, es iecially i the bodies of motor carriages, con'ipris' 1;}; in combination, gripper pivotally mounted on the door and having; a recess near its operating end; a bolt and a tongue so arranged relatively to said recess that said tongue can enter thereinto when the gripper is in position of rest; a pin located in the (icon frame in such a position relatively to sad gripper that the grip ier can engao'e said pin when said gripper is in its ope zitire position; and means to cause the said ,1'i:'ipper to exert pulling action on the pin, sol stantially as set forth.

In witness whereof, I have s gned my name.

CURT WKLLIEALD ALEXES i'lz'illNilEOHll. 

